Power Systems A buchholz relay is used for protection of a transformer against all external faults nether 1 nor 2 both 1 and 2 protection of a transformer against all internal faults protection of a transformer against all external faults nether 1 nor 2 both 1 and 2 protection of a transformer against all internal faults ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which of the following quantities are to be calculated for generator bus? P and Q Q and δ δ and V P and V P and Q Q and δ δ and V P and V ANSWER DOWNLOAD EXAMIANS APP
Power Systems If the rated receiving end voltage is 33 kV, then what are the limits for safe operation of equipments? 31.35 to 34.65 kV 33 to 50 kV 25 to 35 kV any voltage above 33 kV 31.35 to 34.65 kV 33 to 50 kV 25 to 35 kV any voltage above 33 kV ANSWER DOWNLOAD EXAMIANS APP
Power Systems A hydraulic turbine having rated speed of 250 rpm is connected to a synchronous generator. In order to produce power at 50 Hz, the numbers of pole are required in the generator 6. 16. 24. 12. 6. 16. 24. 12. ANSWER DOWNLOAD EXAMIANS APP
Power Systems The power level of nuclear reactor can be increase by ( K = multiplication factor ) lowering the value of K below and keeping at that lowered value. raising the value of K above 1 and keeping it at raised value. lowering the value of K below 1 but later bringing it back to K = 1. raising the value of K above 1, but later bringing it back to K = 1. lowering the value of K below and keeping at that lowered value. raising the value of K above 1 and keeping it at raised value. lowering the value of K below 1 but later bringing it back to K = 1. raising the value of K above 1, but later bringing it back to K = 1. ANSWER DOWNLOAD EXAMIANS APP
Power Systems A transmission line has self and mutual impedances of 0.8 pu and 0.2 pu. Find the positive, negative and zero sequence impedances respectively? 0.8, 0.6 and 1.2 pu 0.8, 0.8 and 1.2 pu 0.6, 0.8 and 1.2 pu 0.6, 0.6 and 1.2 pu 0.8, 0.6 and 1.2 pu 0.8, 0.8 and 1.2 pu 0.6, 0.8 and 1.2 pu 0.6, 0.6 and 1.2 pu ANSWER DOWNLOAD EXAMIANS APP
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